介绍浅水中污染物扩散分析中的有限元法。
A finite element method for analysis of pollutant dispersion in shallow water is presented.
一个是许多污染物扩散的广度和速度是惊人的。
One is that the transport of many pollutants has been surprisingly wide and rapid.
本文叙述了目前城市街道峡谷内机动车污染物扩散的研究现状。
This paper describes the current study on vehicle pollutants dispersion in the urban street canyon.
研究汽车排放污染物扩散规律及模式成为研究治理和降解汽车排放污染的必要手段。
The measures studying on the law and the models of automotive emission diffuse are necessary to cure or degrade automotive emission.
目前，地下水污染物扩散运移规律研究已逐渐成为国内外学者研究的重点和焦点问题。
Nowadays, the transport dispersion law of pollutant in ground water has gradually become the focus of domestic and foreign scholars.
以煤为主的能源结构和不利于污染物扩散的自然环境是兰州市区大气污染严重的主要原因。
Coal is the most important part of energy structure and the natural surroundings in poor dispersion of pollutants in the air are the main reasons for serious pollution in Lanzhou urban.
最后，本文在三维ecom模型下把质点跟踪法应用到了对长江口污染物扩散的数值模拟中。
Finally, under the three-dimensional ECOM model, the Particle-tracing Method is applied to the numerical modeling of the Changjiang Estuary sewage diffusion.
本文分析了影响大气污染物扩散的各种因素，讨论了主要因素对大气污染物扩散的影响趋势。
The various affecting atmospheric pollutants diffusion is analyzed and the effect tendency of primary factor to atmospheric pollutants diffusion is discussed.
对大气边界层内大气湍流和建筑物对道路交叉口处机动车排放气态污染物扩散的影响进行了研究。
The effect of atmospheric turbulence and buildings on the dispersion of gaseous pollutants emitted from motor sources was investigated at the road intersection in the atmospheric boundary layer.
工程上应用的大气污染物扩散模式中，熏烟模式由于其非定常性而与其他扩散模式有很大的区别。
The atmospheric pollutant dispersion models applied to engineering greatly differs from other dispersion models due to their unsteady flows.
针对孔板送风的乱流洁净室，运用C FD软件对不同换气次数条件下的气流组织和污染物扩散进行数值模拟分析。
This paper analyzes and simulates the effect of the air change rate per hour (ACH) on contamination diffusion airflow field in turbulent clean-room of hole-board ventilation by using CFD.
在这种情况下，研究地铁列车振动影响下的多孔介质地下水的溶质运移(污染物扩散)问题具有理论意义和实际意义。
In that case, it is significative that the research which is about hydrodynamic dispersion with the effect of metro trains vibration.
模拟了开门过程病房内外压差的变化，门附近的流场状况，以及进出门气流的变化状态，探讨了开门对污染物扩散的影响。
Simulates the changes of pressure difference, velocity field and the air flow in the door opening process, and discusses the influence to the contamination dispersion.
这里利用成熟的室外大气污染物扩散理论- 梯度输送理论和箱模式理论，提出焊接烟尘在室内的扩散模式和浓度分布的理论计算方法。
In this paper, the diffusion model and the theoretic calculation method of welding dust are given by gradient transportation theory and box model for outdoor atmospheric pollutants.
结合风速等气象要素对污染物扩散、传输和清除进行的分析可知， 监测期间风速对污染物浓度分布起主导作用，气压等其它气象状况对污染物浓度分布也有一定的影响。
Wind speed played a leading role and other meteorological factors also have some effect, which resulted from the influence of the meteorology on diffusion, transmission, elimination of air pollutants.
这种污染物很容易在大范围的地理区域内扩散，保持其毒性，并具有在生物脂肪组织内积累的倾向。
The pollutants disperse easily across wide geographic areas, retain their toxicity, and have a tendency to accumulate in the fatty tissues of organisms.
禁止污染企业和城市污染物向农村扩散，控制农村面源污染。
We will prohibit the relocation of urban polluting enterprises and dispersal of urban polluting materials in the countryside, and control non-point source pollution in rural areas.
不利于污染物的扩散和降解。
并且会导致空气中污染物不易扩散，增强有害物质的毒性，严重的，还可能会导致毒雾发生。
And can lead to air pollutants is not easy to spread, enhanced the toxicity of harmful substances, serious, may also cause smog.
因此有利于污染物的扩散和降解。
It is conducive to the spread of pollutants and degradation.
在现场监测、污染源解析的基础上，应用修正后的高斯扩散模型，计算出燃煤污染物暴露浓度。
Based on the field monitoring , investigation and parsing of pollutants sources, a mathematic model was used to calculate the exposure to pollutants from coal burning.
数值模拟表明了风遇到建筑物时的绕流情况，研究成果可为城市规划和住宅小区建筑物的优化设计以及分析建筑物周围空气污染物的扩散和累积提供参考和应用基础。
The results also provide the useful guideline and references to a certain extent for city planning and designing as well as the diffusion and cumulation of air pollutants around buildings.
官员表示北方恶劣的天气条件也影响了污染物的扩散。
Officials say unfavourable weather conditions in the capital have prevented pollutants from dispersing.
各种污染物在江河中的流动扩散是一很复杂的过程。
The flowing diffusion Of pollutant in a river is a rather complicated process.
各种污染物在江河中的流动扩散是一很复杂的过程。
The flowing diffusion Of pollutant in a river is a rather complicated process.
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